What are the advantages and disadvantages of prestressed concrete? It requires high strength concrete and high tensile strength steel wires. The main disadvantage is construction requires additional special equipment like jacks, anchorage, etc. It requires highly skilled workers under skilled supervision.
What are the advantages of prestress concrete? Prestressing can reduce the volume of concrete required in construction, lowering the use and transportation of materials, as well as boosting durability and service life. Concrete is intrinsically resistant to compressive stresses, but its resistance to tension is much lower.
Should concrete expansion joints be filled? The key is to use the proper sealer or filler depending on the intended purpose and what type of joint it is. Just remember that expansion joints should always be sealed and filled with a flexible joint sealer and never epoxied or coated over.
How much does it cost to pour 1 yard of concrete? Concrete costs an average of $117 per cubic yard, with a typical range between $104 and $144 per cubic yard. Concrete costs an average of $117 per cubic yard, with a typical range between $104 and $144 per cubic yard.
What are the advantages and disadvantages of prestressed concrete? – Related Questions
How long before you can paint new concrete?
Concrete floors should not be painted for at least 60 days after installation. It takes 30 days for the concrete to cure and a further 30 days for the balance of the moisture to leave the concrete.
Is concrete a liquid or solid?
Concrete is a mixture of solids and trapped gas in a liquid that reacts to form a solid, Cement is a powdery solid.
How to calculate m3 concrete?
Concrete is a mixture of solids and trapped gas in a liquid that reacts to form a solid, Cement is a powdery solid.
How do you get rid of black mold on concrete?
The best way to remove mold from concrete is to apply a bleach solution, laundry detergent, and water to the affected area, scrub it with a brush, and rinse it clean with a sponge indoors, or hose or power washer if outside.
Can i pour 2 inches of concrete?
The thinnest that is usually used when pouring concrete, in general, is about 2 to 2 ½ inches. … Any thinner than 2 inches would be too thin. When considering how thick you want the new concrete to be, it is important to consider the surroundings where the concrete will be.
How much is a cube of concrete delivered?
The average cost of concrete is anywhere from $200 – $300 per m3 (cubic metre), though you could pay as much as $350 for 40 MPa strength. Variations in cost are due to local prices differing slightly, the type of concrete you order, and any additives or admixtures required.
How much for poured concrete patio?
Pouring a concrete patio costs between $1,533 and $4,740, with an average cost of $2,532. Pouring a concrete patio can cost $2,532 on average, with most homeowners spending between $1,533 and $4,740 or between $4.40 and $16 per square foot.
How to clean green off concrete?
The best way to remove green algae from concrete is to use a household cleaner known as bleach. Many people say to use water and vinegar; however, bleach is stronger and will keep the algae spores allowing those green algae to die faster and stay off the surface for longer.
Can solid wood go over concrete floors?
With dry concrete and the right subfloors and vapor retarders, solid hardwood floors can be installed on slabs that are either on-grade (at ground level) or above-grade (above ground level). … All concrete, masonry and sheet-rock should be completely dry.
How to adhere wood to concrete?
One of the best ways to secure wood to concrete is also the easiest: epoxy glue. There are certain epoxies that are manufactured specifically for wood-to-concrete use, and you can try using one on its own or combined with nails or screws.
Can you install carpet on concrete floor?
As a general rule, you can lay carpet over concrete. Concrete provides a stable subfloor for carpet, and carpet can be installed on it using the tried and true method that virtually all carpet installation contractors use. You can also install it yourself, however, you need many specialized tools.
Are most people abstract thinkers or concrete?
Most people develop both concrete thinking and abstract thinking through childhood and into adulthood. However, some developmental conditions and external injuries can cause people to have a more concrete style of thinking. Conditions that can prevent or delay the development of abstract thinking include: Dementia.
Do you have to use concrete for playset?
Although we do recommend installing playground equipment with concrete. Ground anchors are made of stainless material, resistant to soil conditions and provide excellent stability.
What adhesive for broken concrete?
Wear and tear on the horizontal surfaces on steps, such as holes, pop-outs and larger cracks, can be repaired using Loctite® Metal And Concrete Epoxy. Loctite Metal And Concrete Epoxy is also ideal for rebuilding vertical surfaces, such as broken step corners or edges.
Can you paint over stained concrete floors?
How easy is it to change the color of stained concrete floors? … To change the color, we’re covering the two most common solutions here: You can re-stain the floors (by applying a new penetrating sealant) or paint them (by applying an industrial coating).
Why does concrete produce heat?
The heat produced by concrete during curing is called heat of hydration. This exothermic reaction occurs when water and cement react. … This exothermic reaction occurs when water and cement react. The amount of heat produced during the reaction is largely related to the composition (Table 1) and fineness of the cement.
What is the difference between lime concrete and cement concrete?
Lime hardens much more slowly than cement-containing mortars, making it much more workable. Lime is also less brittle and less prone to cracking, and any cracked areas can absorb carbon dioxide and mend over time. Cement hardens very quickly, but may be too strong for some applications, e.g., working with old bricks.
How to remove mulberry stains from concrete?
Wet a concrete or stone sidewalk, driveway or patio with the garden hose. Remove mulberry stains from the surface with a solution made from 1 cup 12 percent hydrogen peroxide and a few drops of ammonia mixed in a bowl. Dip a scrub brush in the peroxide solution and scrub the berry stains away.
Can you pour concrete on top of freshly poured concrete?
You can put new concrete over old concrete. However, unresolved issues with your old concrete, such as cracks or frost heaves, will carry over to your new concrete if not taken care of. In addition, you must pour it at least 2 inches thick.
How to remove tile from concrete slab?
Start at a broken tile or between tiles where the grout has loosened. Work the chisel under the tiles, forcing them loose. Strike the face of stubborn tiles to break them up for easier removal. Wear safety glasses, gloves, pants and a long-sleeve shirt, since hammering the tile sends sharp shards flying.
How many coats of primer on concrete?
Usually, one coat of primer is enough to prepare it for painting, but if you are painting over another color, two coats will provide a better finish for your concrete floor.